1. Department of Ophthalmology and Visual Science Yale School of Medicine, New Haven, Connecticut, United States
2. University of California, San Diego School of Medicine, San Diego, California, United States
3. Department of Ophthalmology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States
4. Schepens Eye Research Institute, Massachusetts Eye & Ear Infirmary, Boston, Massachusetts, United States